org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.WeightAdjuster Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.conf.Configurable;
/**
* A pluggable object for altering the weights of apps in the fair scheduler,
* which is used for example by {@link NewAppWeightBooster} to give higher
* weight to new jobs so that short jobs finish faster.
*
* May implement {@link Configurable} to access configuration parameters.
*/
@Private
@Unstable
public interface WeightAdjuster {
public double adjustWeight(FSAppAttempt app, double curWeight);
}